Thin film magnetic head with crystallized glass substrate

Details Thin film magnetic head with crystallized glass substrate Thin film magnetic head with crystallized glass substrate

1990-11-20

1992-08-04

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 531

Patent

active

051364476

ABSTRACT:
A magnetic head having a substrate, a magnetic core means including a magnetic thin film deposited on one surface of the substrate, and a protective plate formed on the magnetic thin layer in a way that the magnetic thin film is interposed between the protective plate and the substrate. At least a portion of the substrate, or of the protective plate or of the both substrate and protective plate is made by crystallized glass. The crystallized glass is obtained by thermally treating glass containing the following oxides on % by weight basis:

REFERENCES:
patent: 4816949 (1989-03-01), Yamada et al.
patent: 4964007 (1990-10-01), Satomi et al.
patent: 5008767 (1991-04-01), Iwata et al.
patent: 5057959 (1991-10-01), Inoue et al.

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